N2011 P1 Q3

N2011 P1 Q3

7 marks
Past Year National Exams
Free

The parametric equation of a curve are

\(x={{t}^{2}}\), \(y=\frac{2}{t}\)

  1. Find the equation of the tangent to the curve at the point \(\left( {{p}^{2}},\frac{2}{p} \right)\), simplifying your answer.[2]
  2. Hence find the coordinates of the points \(Q\) and \(R\) where this tangent meets the \(x\)- and \(y\)- axes respectively.[2]
  3. Find a cartesian equation of the locus of (of the curve traced by) the mid-point of \(QR\) as \(p\) varies.

    [3]

Video Solution:

Default solution

Timothy Gan
  1. List item image
  2. List item image
  3. List item image
Answer:(i) \({y = -\frac{1}{p^3}x + \frac{3}{p}}\) (ii) \({Q(3p^2, 0)}, R\left(0, \frac{3}{p}\right)\) (iii) \({y^2 = \frac{27}{8x}}\)

Need help? Join our JC Math tuition classes.

Learn more